1,5-Methano-1H,3H,11H-furo(3,4-g)pyrano(3,2-b)xanthene-1-crotonic acid, 3a,4,5,7-tetrahydro-8-hydroxy-alpha,3,3,11-tetramethyl-13-(3-methyl-2-butenyl)-11-(4-methyl-3-pentenyl)-7,15-dioxo-, (Z)- 2752-65-0 B''-Guttiferin Cambogic acid Gambogic acid beta-Guttiferin